Then the ref des could be RNABXXX, which is seven characters.
This method will give 999 refdes per page or RNABCXX gives
99 per page.

Or some sort of theme and variation.

Your lucky, I only get 5 characters for a refdes.

Hope this helps.
dave

Ron Dallas wrote:

We have some designs that need up to 3 nested lower levels of
hierarchy to efficiently represent. The lowest level is a 'channel'.
The next up is a group of 4 channels plus some control logic. Then
there is a group of 16 of these plus some control logic. And the
toplevel has several of these groups.

This gives us reference designators like RN11_3_10_6, which is 11
characters long. Our manufacturing folks say they have a limit of 7
characters for reference designators.

Any ideas on how to address this? We could 'rename' all the reference
designators in the design, but that means we lose the benefit of
hierarchy when developing test fixtures and debugging designs.